Magnetic compositions of chromium oxide and methods of manufacture

ABSTRACT

THIS INVENTION RELATES TO THE FORMATION OF FERROMAGNETIC CHROMIUM OXIDE COMPOSITIONS CONTAINING 59% TO 62% CHROMIUM AND 0.05% TO 0.90% CARBON COMBINED WITH OXYGEN AND IN THE FORM OF UNIFORM, FINELY DIVIDED PARTICLES OF TETRAGONAL CRYSTALLINE STRUCTURE. THE PROCESS OF FORMING FERROMAGNETIC CHROMIUM OXIDE CONSISTS OF TREATING A CHROMIUM COMPOUND WITH CARBON OR CARBON CONTAINING COMPOUND, AND THEN SUBJECTING THE MIXTURE TO HEAT AND PRESSURE DECOMPOSITION.



